My understanding was that he was in someone else's yard when the helicopter spotted what is assumed to be him. The person was trying to break or did break the sliding glass door with a tool bar. He ran or jumped something and ran (different reports say it differently) into his grandparents' yard where he was confronted by the police on the ground. I would be guessing, if this is the same guy that was breaking into things, he dropped or threw the tool bar along the way. Of course, I am sure they are looking for it.
Still not sure how someone "points" a cell phone but, otoh, I understand that he should have dropped it or held it in a way that it was obviously a phone not a gun. or put his hands up with the phone in his hand. ANYTHING but point it at them.
OK, so if the helicopter followed him into the backyard they would know it was him trying to break in to another house, if they actually witnessed it.
I haven't seen anything that made it clear he was, or if he just happened to be in the backyard and the police showed up.
I haven't really been following this, so I don't know what details are out there or not, so I'm just thinking out loud so to speak. I think it is easy to see how someone "points" a cell phone, and not in a menacing way but more in a way to show that he doesn't have a gun, or a tool bar or whatever. Like I said I don't know the details, maybe the police said show me your hands or asked what he had in his hands, and his "pointing" it may have just been him showing that it was a cell and nothing else.
I think there are definitely times where shooting someone unarmed is justified, but at face value this doesn't look like one of those times. Even if he was the guy breaking in to homes/cars.
ETA just watched the video, and it is pretty disturbing. They yell for him to show them his hands, one officer yells "gun" then he goes back around the corner and looks like he loads his mag, then turns the corner to face Stephon and yells show me you hands, and before he even finishes the word "hand" he yells "gun gun gun" and starts shooting. They didn't even have time to see what was in his hands, how could they have known what it was or what it wasn't?
He looked 2 times and couldn't identify whether or not it was a gun? He made an assumption that cost someone their life. He should be held accountable.